6th RM- Decimal Day

Responsive Math

6th Grade

1/11/2021

Have scratch paper ready!

Check in Question: What is your goal for next week's IA? (Answer in Chat!)

Decimal Day Agenda!

• Adding Decimals Review and CFU

• Subtracting Decimals Review and CFU

• Multiplying Decimal Review and CFU

• Practice

• Last 5 and Close- Out

Part 1

Adding Decimals

Multiple Select

Which problem was solved correctly?

Key Point #1

To add, digits must be in the same place value

Fill in the Blanks

CFU #1: Find the sum of 54.2 and 0.53.

Answer #1

Part 2

Subtracting Decimals

Multiple Select

Which problem is solved correctly

Key Point #2

To subtract, digits must be in the same place value

Open Ended

CFU #2: Jeff subtracted 4.3 from 9.85 and got a difference of 9.42. Did he subtract correctly? If yes, how do you know? If no, explain the mistake he made and provide the correct work.

Answer #2

Jeff subtracted incorrectly. He made the mistake of not subtracting digits in the same place value. The answer should be 5.55.

Part 3

Multiplying Decimals

Multiple Select

What is the product of 3.45 and 0.08?

• 0.276

• 2.76

• 27.6

• 276

• 2,760

Key Point #3

To multiply, the number of decimal digits in the factors will be the same as the number of decimal digits in the product

Fill in the Blanks

Gina was combining liquids to make a solution. She combined 5.9 batches of a 0.452 liter solution into one container. What is the total amount of liquid in the container?

Answer #3

The total amount of liquid is 2.6668 liters.

Practice!

Criteria for Success

• When adding and subtracting, digits are lined up by place value

• When multiplying, decimal point is placed correctly in answer

• Estimation used to check

Multiple Choice

6.09 - 1.23 =

• 5.36

• 4.86

• 5.26

• 4.0

Multiple Choice

0.65 × 1.2 =

• 78

• 7.8

• 0.78

Multiple Choice

3.7 - 1.24 =

• 2.54

• 2.50

• 3.46

• 2.46

Multiple Choice

21.56 - 9.56 =

• 15

• 17.43

• 15.40

• 12

Multiple Choice

9.08 + 14.6 =

• 23.16

• 23.68

• 19.50

• 24.68

Multiple Choice

What is the product of 0.5 and 3.5?

• 0.14

• 1.75

• 7

Multiple Choice

Alexis rode her bike 4.5 miles. Johnny rode his bike 8.1 miles. How many more miles did Johnny ride his bike?

• 3.6

• 2.7

• 4.6

• 12.6